To remove the walls in your restaurant simply: 

Press down on the wall/s you would like to remove 
Choose the erase option 
Drag over the walls you would like to demolish If you have any paintings/windows or doors on these walls the decorations will be stored for you for free in the shop ready to use again. 

Now you can create amazing terraces outside for your customer to enjoy the good weather and food! 

We hope you enjoy decorating your restaurant.
For more help check out our video below.